Nut-making machine.



No. 837,435. PATENTED DEC. 4, 1906.

. P. G. TRUEBB.

NUT MAKING MACHINE.

APPLICATION FILED MAR. 13. 1905.

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No. 837,435. PATENTED DEC. 4, 1906.

P. G. TRUEBB. NUT MAKING MACHINE.

APPLICATION FILED MAR. 13. 1905.

2 SHEETS-SHEBT 2.

252 2268865: jzaerzion .%&mdm/. WM fiAWM ATE i QFFIG NUT-MAKING MACHINE.

Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed March 12,1905- Serial'No. 249,767.

To all whom it may concern:

Be it known that I, PAUL G. TRUEBE, a subject of the German Em eror, nowresiding at Allegheny, in the tate of Pennsylvania, have inventedcertain new and useful Improvements in Nut-Making Machines, of which thefollowing is a'specification.

My invention relates to mechanism for automatically forming the blanksof metallic nuts ready for threading, and its prim objects are, to formthe nut blank without s earing, to press the nut into finished shape andpunch it at one operation without movin the nut, to provide moreefficient feeding an ejecting devices for such machines,- to ro videsuperior cooling means for the punc es, and to generally simplify andmake a more accurate operation of nut forming machines. These objectsand other advantages which will hereinafter ap ear, I attain by means ofthe construction illustrated in a preferred form in the accompanyingdrawings,'where- Figure 1 is aside elevation of the whole machine withparts of the dies shown in section;

Figure 2 is a partial horizontal section of the machine taken on line(2) in Figure 1 and line (2, 2) in Figure 3;

Figure 3 is a partial vertical section through the machine taken alongthe line (3) in Figure 2 i Figure 4 is a detail partly in section online (4) in Figure 1, showing the means for operatin%the plunger head ie 5 is a partial horizontal section through the punches, taken along theline (5) in Figure 6;

Figure 6 is a partial vertical section through the plungers, showing theunches in action and the means for coo ing the punches;

Figure 7 is a section taken at right angles to the sectionof Figure 6,and

Figure 8 is a partial sectional view showing the operation of the formindies in cutting oil and shaping the nut blan s.

In order to avoid waste of the metal in makin the blanks from bars, Ishape the blank m the first instance by forming dies which cut andpress-the shape and do all the necessary shearing in compressing the hotmetal into the form of the blank at once,

In order which is connected, to a sliding cross-head 29 leaving nowaste. (See Figure 8.)

blank is ressed in the finishing die to give it its finals ape, and havearranged the operating parts so that the nut does not materially moveduring the o eration from its original position as cut off from thestock bar. machine is shown in its simplest and most compact form in thedrawin but it will be understood that its general features are aplicable to different forms of nuts and li e articles and the machinemay be elaborated to moreefiiciently affect the various operations, theexample shown being merely illustrative of the general features and theprinciple of operation.

In the accompanying drawings it will be seen from Figure 1* that I haveprovided upon The a base 10, two uprights 1 1, which carry aheavyhorizontal shaft 12 driven by a large gear wheel 13, which in turn maybe driven y a gear 14 from a pulley shaft or otherwise supplied withpower as may be desired. Referring to Figures 2 and 3 especially; thebar of hot stock metal A is preferably fed into the machine direct froma heating furnace, and drawn between two rollers 16 which are mountedupon shafts 17 attached to a vertical plate or other sup ort 15 on theback side of the machine. T e shaft 17 carries a ratchet wheel. 18 andabove its shaft, upon a supplemental shaft 19 I have mounted a feedingdog upon a pivoted arm 20 which has an upward extension 21 and this isoperated by the link 22 which has a head engaging an eccentric upon theshaft 12, as will be seen from Figure 3. This mechanism automaticallyadvances the bar of stock'rnetal A into the machine at intervals, and apredeterminal distance.

The bar A being fed in a horizontal direction through the machine,sliding on to of the finishing dies to be hereinafter descri ed, isbrought into proper position by means of an adjustable stop bar 23 shownin Figures 2, 3, and 8, and the present machine is arranged to make fournuts at a time. The bar being in place is cut by the horizontallyreciprocating forming or shaping dies 24 and 24*, which are mounted uponhorizontally sliding brackets 25 resting upon the plates 26 on the base10 of the machine. They are reciprocated to and fro by means of thetoggle links 27, 27, which are spread horizontally by the downwardmotion of a link 28 to simplify the machine, I punch the central guidedin fixed guides 30 and moved by hole in the blank at the same time thatthe means of a link 31, which has a yoke engaging an eccentric 32 uponthe horizontal driving shaft 12. It will be clear from Figure 8 how thecoming together of these two serrated dies 24, 24, will form aseries ofnut blanks a, a, pressing and cutting them off from the bar and at thesame time giving them'a hexagonal form.-

Mounted upon the front of the sliding brackets 25', on plate 26 andbeneath the dies 24, 24 is a two-part finishing die33, 33*, withproperly formed steel faces. 35 as may be desired, and they are mountedto reciprocate with the sliding brackets 25, but also having a motionindependent from them, being first closed together by means ofcompression springs .34 uponpivote'd boltson the bracket as shown inFigure 1. It is to be noted that in the horizontal reciprocating motionof the brackets 25, the finishing dies 33, 33, will be brought togetherbefore the forming dies 24, 24" meet, and in the re-' verse motion theforming dies will open first and afterward the finishing dies will bedrawn open. I

' he blanks for the nuts having been pressed as shown in the form ofFigure 8, it will be seen from Figure 1 especially, that I have provideda pressing plunger 36 which is carried in a head 37 adjustably attachedtoa reciprocating cross-head 38 by means of bolts and adjustable thereinby the wedges 39 to the proper height. The cross-head 38 reciprocates infixed guides 40 and is moved as shown in Figure 4, by means of a link 41which has a yoke engaging aneccentric 42 fixed upon the main drivingshaft 12 of the machine. The plungers 36 descending at the propertime'will' press the nut blanks a,

a, a, a, through the forming dies and into the finishing dies 33, 33Immediately thereupona punch 43 descends to form the hole in the nut.This punch is carried in a stock 44 which is firmly secured in across-head 45 guided inside of the head 38 and is forced down 'at theproper time by means of the cam 46 which is fixed upon the shaft 12. Thehead 45 is normally pressed upward in head 37-38 by means of coilsprings 47 or by any other-means as may be desired. The

punch 43 descends and cooperates with a properly formed hole in thebottom of the finishin dies 33, 33 to unch out the thread hole. hereuponthe rackets 25 first recede carrying with them the finishing dies 33,

33 and immediately upon these being'opened the unch 43 is withdrawn fromthe nut, whic is thus left entirely loose from all surrounding parts anddrops down from contact with the plunger 36 through the dies and to thebottom of the machine in a finished condition.

From Figures 5,6, and 7 especially, it will be observed. that I haveprovided for the cooling of the unches 43 by means of a water pipe 48 w'ch may enter through head 37 to plunger 36, to a continuous passage 49being inserted in the machine in hot condition is set'forward asuificientdistance to bring its end against the stop 23 by means of theroller 16 and'the ratchet 18 operated as heretofore described; whereuponthe hori-- zontally reciprocating forming dies 24, 24*, come togetherand at the same time cut and forge and compact the metalthoroughly,forming a number'of blanks for the nuts. While these dies are stilltogether, the plunger 36 descends and shoves the blank into thefinishing dies 33, 33*, which it will be observed are spring pressed andare brought toether a litt e in advance of the closing of the ormin diesand also remain together a little after t e' separation of the formingdies.

-While the nut blank is in the finishing dies and is ke t pressed downfirmly by the pluner '36, t e punch '43 descends and forms a oletherein, whereupon the forming dies 24, 24- are first withdrawn andimmediately thereupon the finishing dies 33, 33, leaving the nut on thepunch 43 in contact with the plunger 36; the punch is then withdrawn,when the nut in finished condition drops into the bottom of the machine,and the same operations are repeated, theplungers and dies being keptcool in the meanwhile by the flow of water through thepi e 48 and itsconnected assages as hereto fore described. The nut lanks are thus cutoff from the stock bar and they are not moved exce t to shove them fromthe forming dies, an the punching and finalshaping of the nut take p aceat the same time, without relative movements of the parts. There is noshearing action roper, and it will be observed that by the form of thedies 24 and 24 the metal is forged and thoroughly com acted and that theblank is held upon all si es by the finishing die at the time. thepunching is done, so that the punching will not distort the shape of thenut or cause the hole to be punched in an inaccurate position. The punchis guided lowing: I

1. n a nut making machine, the combination with a pair of cutting andforming dies,

of a sectional die beneath and in re ister therewith, a plungeroperating to pus 1 tion with a pair of reciprocating members carryungcooperatlnlformmg dies, and means to move them toge er, of a sectionalfinishing die carried on each forming die and in register therewiththere being means for holding the finishin dies resiliently in contactwith each other, the same moving with and in advance of the formingdies, and a plunger operatin to remove the nut from the forming dies anpress it into said finishin die at one motion, substantiallyas describe3. In a nut making machine the combination witha set of formin dies anda set of finishing dies immediate y thereunder and means for closing thedies, of a plunger and a punch located in the plunger, means to operatethe plunger and press the blank into the finishing die, means to de ressthe punch, and means to withdraw all t e dies before the punch iswithdrawn from the nut, substantially as described.

4. In a nut making machine the combination with suitable dies, of thepresser plunger 36 and the punch 43 located therein and means fordepressin and raising the plunger both in advance 0 the movement of thepunch therein,substantiall as described.

5. In a nut forming mac ine the combination with operating to gle linksand mechanism for reciprocating ti rocating and forming dies attached tosaid links, a pair of finishln dies resiliently supported on the formingms, in advance but 1n normal alinement therewith, and a suitable plungerand punch for removing the nut em of a pair of recipblank from theformin die to the finishing die" and punching, it in p ace therein,substantially as described.

6. In a nut making machine a punch and a cooling device for the punchescomprising a guiding casing having a spirally arranged passage aroundthe punch and means for reci rocatin the punch through said casing,wliereby a 1 parts of the punc are'brought in contact with the water,substantially as described.

7. In a nut making machine the combina tion with the forming dies, of aplunger for removin the nut from said die, and a punch therein orperforating the nut, and 'a water supply and a assage in said plungerspirally surrounding the unch ,and having an outlet discharge to (:00the dies, substantially as described.

8. In a nut makin machine the combination with suitable ies, and aplunger for moving and holding the nut, of a perforating unch operatingin the lunger, and means fbn adjust-in the vertica travel of the plungerinde en ent of the punch, substantially as descri ed.

9. In a nut making machine the combination with suitable formin andfinishing dies of a pressing plunger an a punch contains within said punger, andmeans to reci rocate it therein so as to perforate the nut wile the plunger holds it down in the finishing die, and means for,removing of the dies before the withdrawal of the punch from the nut,substantially as described.

Intestimony whereof I have hereunder signed my name in the presence ofthe two subscribed Witnesses. I

PAUL e. TRUEBE.

Witnesses F. E. GAITHER, ARoHwoRTH MARTIN.

